24results about How to "Wide spectral response range" patented technology

The embodiment of the invention provides a thin film and a preparation method thereof, a display device and protection equipment. The thin film comprises a main film layer, the main film layer comprises a metal oxide and a second metal, the metal element contained in the metal oxide is a first metal, the first metal and the second metal are both transition elements, the molar ratio of the first metal to the second metal is 1: (0.05-0.1), and the first metal is a metal oxide. The atomic numbers of the first metal and the second metal are different, and the metal oxide is in a crystalline state. The thin film provided by the embodiment of the invention has relatively high absorptivity for blue light with specific wavelength, prevents blue light damage, and can ensure the high transmittance requirement of other visible light residual wave band light at the same time.

The invention relates to a defect-free ultrathin continuous MOF (Metal Organic Framework) film as well as a preparation method and application thereof. The MOF membrane is synthesized by taking an amidoxime functionalized commercial polyacrylonitrile ultrafiltration membrane as a support body through a diffusion method, and the thickness of the MOF membrane is 22 nm to 1.36 microns. The preparation method comprises the following steps: firstly, respectively preparing aqueous solutions of Fe < 3 + > salt and organic ligands, then respectively placing the aqueous solutions on two sides of a support body, and synthesizing the defect-free ultrathin continuous MOF membrane at room temperature by utilizing a pair diffusion method. Compared with the prior art, the thickness of the defect-free ultrathin continuous MOF membrane is controllable, the minimum thickness can reach 22 nm, the membrane flux and the rejection rate of organic pollutants can be regulated and controlled, the defect-free ultrathin continuous MOF membrane has photocatalytic degradation performance, organic pollutants can be treated through membrane separation and photocatalytic coupling technologies, and the defect-free ultrathin continuous MOF membrane has great application value in the field of wastewater treatment.

The invention discloses a Co-MOF / TiO2 heterojunction-based photocatalysis-PMS activation catalyst and a preparation method and application thereof, specifically, TiO2 nanosheets and porphyrin-based MOF are coupled to construct a Co-MOF / TiO2 heterojunction hybrid material, and the material has the performance of synergistic photocatalysis of peroxymonosulfate activation and is used for catalyzing degradation-resistant bisphenol A, PMS, PMS, PMS, PMS, PMS and PMS. The compound is an effective synergistic photocatalyst and has many advantages that (i) the porous structure of the metal organic framework promotes mass transfer in the catalytic process, so that the catalytic process is further promoted; (ii) a chromophore at the center of a porphyrin structure can enhance the light capturing ability of the metal organic framework (under visible light, photoinduced electrons can be continuously migrated to adsorbed PMS to promote the activation process of the PMS); and (iii) the heterojunction formed between the TiO2 and the Co-porphyrin ligand further promotes the separation of photon-generated carriers.

The invention discloses a perovskite / crystalline silicon four-terminal laminated solar cell and a preparation method and application thereof. The perovskite / crystalline silicon four-end laminated solar cell comprises a top cell and a bottom cell, the top cell is a perovskite solar cell, and the bottom cell is a crystalline silicon cell; the top cell comprises a conductive substrate layer, a hole transport layer, a perovskite layer, an electron transport layer, a modification layer and a semitransparent metal electrode layer which are stacked in sequence; the semitransparent metal electrode layer is of a multi-layer structure formed by sequentially stacking a medium 1 / Al / Ag / medium 2; the medium 1 and the medium 2 are both transparent materials. The semitransparent metal electrode of a dielectric 1 / Al / Ag / dielectric 2 multi-layer structure is used for replacing an ITO electrode, the spectral response range of the perovskite / crystalline silicon laminated solar cell is widened, the efficiency of the solar cell is improved, meanwhile, the preparation cost is reduced, and the perovskite / crystalline silicon laminated solar cell is suitable for large-area preparation and beneficial to commercial industrialization.

The invention relates to the technical field of photocatalysts, in particular to a nonmetal plasmon heterojunction material, a preparation method and application thereof and a method for preparing p-aminophenol through reduction of p-nitrophenol. The nonmetal plasmon heterojunction material provided by the invention comprises a C3N4 nanosheet and a WO3-x nanoplate (x is 0.1 to 0.3) positioned on the surface of the C3N4 nanosheet. The WO3-x local surface plasmon characteristic can effectively expand the spectral response range of the non-metal plasmon heterojunction material in a visible region to a near-infrared region, and the light absorption efficiency of the non-metal plasmon heterojunction material is remarkably enhanced. The nonmetal plasmon heterojunction material provided by the invention can realize efficient reduction of p-nitrophenol based on the synergistic effect of an interface heterojunction, a built-in electric field and oxygen vacancies, is high in selectivity, has excellent photocatalytic activity for reduction of p-nitrophenol, and is excellent in photocatalytic activity stability.

The utility model discloses a tensile strain germanium substrate and a tensile strain germanium sensor, which can be used in the field of semiconductors. The tensile strain germanium substrate comprises a first silicon substrate, a first intrinsic strain germanium layer, an intrinsic strain germanium / germanium-silicon multi-quantum well layer, a second intrinsic strain germanium layer, a second doped strain germanium layer, a ferroelectric oxide layer and a dielectric layer which are stacked in sequence; the diameter of the first silicon substrate is not less than 8 inches. Therefore, according to the germanium-based sensor manufactured based on the tensile strain germanium-based substrate, on one hand, the ferroelectric oxide has a negative capacitance effect, so that relatively large positive capacitance in a thick germanium vertical PIN structure can be effectively compensated, the capacitance of the whole germanium-based sensor is reduced, and meanwhile, high responsivity and high working speed of the germanium-based sensor are realized; and on the other hand, two photoelectric sensing layers including the second intrinsic strain germanium layer and the intrinsic strain germanium / germanium-silicon multi-quantum well layer exist, and the spectral response range of the germanium sensor can be remarkably expanded through the combined structure of the second intrinsic strain germanium layer and the intrinsic strain germanium / germanium-silicon multi-quantum well layer.

The application discloses a lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material with regular flower-like morphology and a preparation method and application thereof. A lignin carbon-based halogen bismuth oxide Z-type heterojunction composite material BiOX / C with regular flower-like morphology, wide spectral response range, high efficiency and strong stability is synthesized by using lignin carbon with rich oxygen-containing functional groups for induction and pH regulation. Based on the flower-like morphology structure and Z-type heterojunction of the material, the separation of photo-generated carriers and holes is effectively promoted, so that the material has higher photo-reaction efficiency, and the shortcomings of traditional photocatalytic degradation of organic pollutants, such as low quantum efficiency, slow degradation rate, poor stability, easy deactivation and the like, are effectively solved. Moreover, the lignin carbon-based substrate material takes lignocellulose in agricultural waste as a carbon source, is environment-friendly and low in production cost, and has the advantages of simple synthesis method, considerable yield, mild reaction condition in the process of photocatalytic degradation of organic pollutants, simple operation and wide application prospect.

The utility model discloses a planar tensile strain germanium sensor, which can be used in the field of semiconductors and comprises an oxide layer, a dielectric layer, a second doped germanium layer, a second intrinsic germanium layer, an intrinsic germanium / germanium-silicon multi-quantum well layer, a first intrinsic germanium layer and an ion doped mask layer which are sequentially stacked, the ion doping mask layer is discontinuously distributed on one side, deviating from the oxide layer, of the first intrinsic germanium layer; the region, covered by the ion doping mask layer, in the first intrinsic germanium layer is provided with a non-ion doping region; the non-ion doped region is provided with a groove, and the bottom of the groove is a second doped germanium layer; a first electrode is arranged on one side, deviating from the oxide layer, of the ion doped region in the first intrinsic germanium layer; the groove is filled with a second electrode; a non-ion doped region is arranged between the second electrode and the ion doped region. Therefore, no exposed ion doped region exists on the side wall of the groove, and the problem of current leakage on the surface and the side wall of the pixel can be reduced or even thoroughly avoided.

The invention discloses a broadband spectrum integrated spectrometer based on coupling of a waveguide grating and a scattering array, one side of an optical waveguide is etched with the waveguide grating, and the outer side of the waveguide grating is provided with the scattering array. The CMOS detector is used for detecting the spatial distribution of the scattering light intensity of the scattering array and reconstructing an incident spectrum by using the light intensity distribution. Wherein the waveguide grating adopts a waveguide grating with a gradual change period, and the Bloch mode of incident light with different wavelengths is localized at different spatial positions of the waveguide grating. The scattering array comprises scattering units, the scattering units are distributed in an array mode, each scattering unit is composed of nanorods arranged in a 2 * 2 matrix mode, and the radiuses of the nanorods of the scattering array gradually change in the extending direction of the optical waveguide. According to the invention, the Bloch mode local area of the waveguide grating and the scattering array resonance of the nanorod array are combined, the problem that the resolution precision of a traditional spectrometer is limited by the volume is solved, and the integrated spectrometer with high resolution capability and wide spectral range is realized.

The invention discloses a spider silk loaded sulfide hollow nanotube composite material, belonging to the field of materials, the composite material is a spider silk loaded CdS nanocomposite material with a nanotubular structure obtained by in-situ growing CdS on spider silk; or, a spider silk loaded CdS / NiS nanocomposite material with a nanotubular structure obtained by in-situ growing CdS on spider silk and then loading NiS. The invention is simple to operate, environmentally friendly, can obtain spider silk in-situ loaded CdS or CdS / NiS hollow nanotubes with controllable size, morphology and atomic ratio, improve the dispersibility of CdS or CdS / NiS nanomaterials; change the motion trajectory of photogenerated electron holes, effectively prevent the recombination of photogenerated electrons and holes, and improve the photoelectric efficiency.

The invention discloses a TiO2-Fe2O3 ordered hierarchical structure nanorod array and a preparation method and application thereof, and belongs to the technical field of materials and environmental protection, a rutile type TiO2 film and a precursor I are mixed, a first hydrothermal growth reaction is performed to obtain a TiO2 first-level nanorod array, the TiO2 first-level nanorod array and a precursor II are mixed, a hydrothermal growth reaction is performed again, and drying and annealing are performed to obtain the TiO2-Fe2O3 ordered hierarchical structure nanorod array. The precursor I is a NaCl saturated aqueous solution of TiCl3, and the precursor II is a NaCl saturated aqueous solution of TiCl3; and the precursor II is a NaNO3 saturated aqueous solution of FeCl3. The TiO2-Fe2O3 ordered hierarchical structure nanorod array provided by the invention has good research potential and practical application prospect under a sun illumination condition in application and popularization in the field of practical wastewater advanced treatment.

The application relates to a kind of cascade low-temperature single-photon detectors based on torsion semimetal materials, comprising: substrate, cascade structure and electrode;Wherein, the cascade structure is arranged on the substrate;The electrode is arranged on the cascade structure;The cascade structure is formed by the alternating stacking of dielectric layer and Dirac semimetal material;The outermost layer of the cascade structure from bottom to top and from top to bottom is the dielectric layer;The electrode includes a top gate electrode arranged at the top of the cascade structure and a plurality of source / drain metal contact electrodes arranged on the Dirac semimetal material.The beneficial effects of the application are: the Fermi level of the Dirac semimetal material used in the application is adjustable, the internal carrier concentration is controlled by the gate region, and the single-photon energy can excite to generate a photovoltage signal.

The invention discloses a degradable medicinal plastic bottle and a preparation method thereof. The mass ratio of polylactic acid, a biodegradable elastomer, a compound plasticizer, a nucleating agent and a photosensitizer in the degradable medicinal plastic bottle is 100: (15-20): (2-4): (2-4): (1-3); the biodegradable elastomer is obtained by mixing polyhydroxybutyrate, polycaprolactone, polybutylene succinate and the like in a weight ratio; the compound plasticizer is obtained by mixing a bio-based polycarboxylic acid plasticizer, a cellulose grafted polycaprolactone derivative, modified castor oil and acetyl tributyl citrate; the nucleating agent is one of a polylactic acid stereocomplex and TMC-200; and the photosensitizer is modified titanium dioxide, which effectively solves the problem that the plastic bottle in the prior art is insufficient in physical properties, photocatalytic efficiency and antibacterial properties.

The utility model discloses a relaxor germanium system substrate and a relaxor germanium system sensor, which can be used in the field of semiconductors, and the relaxor germanium system substrate is used for forming the relaxor germanium system sensor. The relaxor germanium substrate comprises a first germanium substrate, a first intrinsic relaxor germanium layer, an intrinsic relaxor germanium / germanium-silicon multi-quantum well layer, a second intrinsic relaxor germanium layer, a second doped relaxor germanium layer, a ferroelectric oxide layer and a dielectric layer which are stacked in sequence, the first intrinsic relaxation germanium layer, the intrinsic relaxation germanium / germanium-silicon multi-quantum well layer and the second intrinsic relaxation germanium layer are formed by sequentially performing homoepitaxy on one side of the first germanium substrate. Therefore, according to the relaxation germanium system sensor manufactured based on the relaxation germanium system substrate, the high-quality first intrinsic relaxation germanium layer and other film layers are formed on the germanium substrate in a homoepitaxy mode, the crystal quality of the germanium layer on the top of the vertical PIN structure in the germanium system sensor is obviously improved, and the responsivity and the working speed of the germanium system sensor are improved.

The utility model discloses a planar relaxation germanium sensor, which can be used in the field of semiconductors, and comprises an ion-doped germanium substrate, an intrinsic relaxation germanium / germanium-silicon multi-quantum well layer, an intrinsic relaxation germanium layer and an ion-doped mask layer which are sequentially stacked, the ion doping mask layer is discontinuously distributed on one side, deviating from the germanium substrate, of the intrinsic relaxation germanium layer; the intrinsic relaxation germanium layer comprises an ion doped region and a non-ion doped region; a first electrode is also arranged on one side, deviating from the germanium substrate, of the ion doping region; a second electrode is further arranged on the side, away from the ion doping area, of the germanium substrate. Therefore, on one hand, by adopting the germanium substrate, the quality of the intrinsic relaxation germanium / germanium-silicon multi-quantum well layer and the intrinsic relaxation germanium layer can be improved, so that the performance of the germanium sensor is improved; and on the other hand, each pixel has no exposed side wall, and the ion doped regions of different pixels are isolated through the non-ion doped regions, so that the problem of current leakage on the surfaces and the side walls of the pixels can be reduced or even thoroughly avoided.

The present invention provides a recyclable nano-carbon / titanium oxide-based water treatment photocatalytic material and a preparation method thereof, and belongs to the field of photocatalytic technology. The present invention first mixes nano-carbon powder, anhydrous ethanol, and glacial acetic acid, then adds an organic titanium source and an oxide quantum dot aqueous solution, and then ages and dries to obtain a nano-carbon / titanium oxide precursor dry gel; then disperses an adhesive and an organic polymer in water to obtain an adhesive liquid; disperses the nano-carbon / titanium oxide precursor dry gel in the adhesive liquid to obtain a nano-carbon / titanium oxide adhesive mixed liquid; finally, the nano-carbon / titanium oxide adhesive mixed liquid is sprayed on the surface of a porous matrix material, and a recyclable nano-carbon / titanium oxide water treatment photocatalytic material can be obtained by drying and calcining. The present invention constructs a narrow-band oxide quantum dot-nano-carbon / titanium oxide-based material, and uses it as a raw material to prepare a nano-carbon / titanium dioxide water treatment photocatalytic material that is easy to recycle and has high catalytic activity.

The invention discloses a preparation method of a multi-vacancy core-shell ZnO (at) ZnS heterojunction, a product and application of the multi-vacancy core-shell ZnO (at) ZnS heterojunction. According to the method, a metal-coordination polymer ZnTMT is used as a template, and the ZnO and ZnS heterojunction with excellent photocatalytic performance is prepared through hydrothermal and high-temperature calcination processes. The ZnO-coated ZnS heterojunction contains rich zinc vacancies, oxygen vacancies and sulfur vacancies, can significantly improve the separation efficiency of photon-generated carriers, enhances the photocatalytic activity of the ZnO-coated ZnS heterojunction, and can be applied to degradation of organic pollutants in seawater under visible light irradiation. The preparation method is simple, efficient, easy to operate, low in cost and beneficial to large-scale production. The ZnO-coated ZnS heterojunction obtained by the invention can realize efficient degradation of organic pollutants in seawater under the condition of not increasing extra energy consumption, and has important environmental value and economic value.

The invention discloses a photocatalytic heterojunction material for synergistically producing hydrogen and degrading glucose and application of the photocatalytic heterojunction material, and belongs to the technical field of biological medicines. The photocatalytic heterojunction material is a two-dimensional nanosheet and comprises elemental bismuth, oxygen-deficient Bi2WO6 and hydrogen-doped TiO2. The preparation method comprises the following steps: preparing Bi2WO6 from Na2WO4. 2H2O and Bi (NO3) 3.5 H2O through a solvothermal reaction; then carrying out hydrothermal reaction on tetrabutyl titanate and Bi2WO6 to prepare Bi2WO6 / TiO2 (Bi2WO6 / TiO2); and finally, carrying out vacuum calcination on sodium borohydride and Bi2WO6 / TiO2 to obtain the photocatalytic heterojunction. The photocatalytic heterojunction constructed by the invention widens the spectral response range and improves the transfer utilization rate and photon absorption utilization rate of photon-generated carriers, so that the material can produce hydrogen by photolysis of water with glucose as a sacrificial agent in the visible light range, and the functionalized hydrogel material prepared from the material treats DFU by cooperatively adjusting the DFU wound surface microenvironment.

The invention discloses a treating agent for efficiently removing heavy metals in industrial sewage and a preparation method of the treating agent, and belongs to the technical field of sewage treatment. The treatment agent is prepared by compounding modified charcoal and Co-Cu doped nano titanium dioxide according to a ratio. The modified biochar has more active sites and specific surface area and can better adsorb various heavy metal ions in sewage, and then the Co-Cu doped nano titanium dioxide reduces the heavy metal ions enriched on the surface of the biochar into harmless substances by utilizing photocatalysis. The Co-Cu doped nano titanium dioxide can generate more photo-induced electrons and holes so as to initiate a more efficient oxidation-reduction reaction, the Co-Cu doped nano titanium dioxide and the Co-Cu doped nano titanium dioxide have a synergistic effect, an excellent effect of removing heavy metal ions in water is achieved, and the Co-Cu doped nano titanium dioxide has a good market application prospect.

The invention discloses a degradable medicinal plastic bottle and a preparation method thereof. In the degradable medicinal plastic bottle, the mass ratio of polylactic acid to a biodegradable elastomer to a compound plasticizer to a nucleating agent to a photosensitizer is 100: (15-20): (2-4): (2-4): (1-3); the biodegradable elastomer is obtained by mixing polyhydroxybutyrate, polycaprolactone and poly (butylene succinate) according to the weight ratio of the polyhydroxybutyrate to the polycaprolactone to the poly (butylene succinate); the compound plasticizer is obtained by mixing a bio-based polycarboxylic acid plasticizer, a cellulose grafted polycaprolactone derivative, modified castor oil and acetyl tributyl citrate; the nucleating agent is one of a polylactic acid steric compound and TMC-200; the photosensitizer is modified titanium dioxide, and the problems that in the prior art, a plastic bottle is insufficient in physical performance, photocatalytic efficiency and antibacterial performance are effectively solved.

The invention discloses a high-frequency detection array plane based on near-infrared photosensitive core-shell nanowires and a preparation method of the high-frequency detection array plane, and belongs to the technical field of phototransistors. The detection array plane comprises a grid electrode, the upper end of the grid electrode is covered with an insulating layer, a source electrode and a drain electrode are arranged on the two sides of the upper end of the insulating layer respectively, and a core-shell nanowire PIN structure is further arranged at the upper end of the insulating layer and located between the source electrode and the drain electrode; the core-shell nanowire PIN structure comprises an inner layer ZnO nanowire arranged at the upper end of the insulating layer and used as an N-type layer; an intermediate layer PbSe two-dimensional nano fragment is arranged on the upper surface of the inner layer ZnO nanowire and is used as an intrinsic layer; the upper surface of the middle layer PbSe two-dimensional nanometer fragment is covered with an outer layer NiO thin film which is used as a P-type layer. The PIN structure is beneficial to formation of effective carrier separation and transmission at an interface, so that the photoelectric conversion efficiency of the device is improved; niO and ZnO are stable semiconductor materials and have good chemical stability and thermal stability.

The invention provides a GaAs heterojunction solar cell based on a multifunctional N-GQD composite film and a preparation method of the GaAs heterojunction solar cell. The solar cell comprises a GaAs substrate, and an N-GQDs interface passivation layer and a doped N-GQDs hole transport layer are sequentially arranged on the GaAs substrate; n-GQD is subjected to hydro-thermal synthesis through low-cost raw materials, then an interface passivation layer of the heterojunction cell is prepared through simple spin coating, a hole transport layer thin film is prepared through a suction filtration method and transferred to a GaAs substrate, and finally, a layer of N-GQDs is spin-coated on the surface of the hole transport layer thin film to prepare the solar cell, so that the spectral response range of the GaAs solar cell can be effectively widened; the interface carrier recombination is reduced, and the efficiency is improved.

An optical chip comprises a beam splitter, an optical waveguide and a gradient photonic crystal, the optical waveguide comprises an input optical waveguide and an output optical waveguide, the input end of the beam splitter is connected with the input optical waveguide, and the output end of the beam splitter is connected with the output optical waveguide. A plurality of output ends of the beam splitter are respectively connected with one end of the output optical waveguide, and the other end of each output optical waveguide is respectively connected with the gradient photonic crystal. And the CMOS detector is used for reconstructing the spatial distribution of the scattered light intensity leaked from the gradient photonic crystal to obtain an input spectrum. According to the broadband spectrum integrated spectrometer based on gradient photonic crystal dispersion provided by the invention, the scattering hole chirp array is designed on the side edge of the waveguide to form the photonic crystal, and high-precision spectral resolution is realized in a very small volume by utilizing the sensitive angular dispersion of the photonic crystal and wavelength guidance of a gradient structure in space.